2014A&A...572A..30K


Query : 2014A&A...572A..30K

2014A&A...572A..30K - Astronomy and Astrophysics, volume 572A, 30-30 (2014/12-1)

Spectroscopic signatures of extratidal stars around the globular clusters NGC 6656 (M 22), NGC 3201, and NGC 1851 from RAVE.

KUNDER A., BONO G., PIFFL T., STEINMETZ M., GREBEL E.K., ANGUIANO B., FREEMAN K., KORDOPATIS G., ZWITTER T., SCHOLZ R., GIBSON B.K., BLAND-HAWTHORN J., SEABROKE G., BOECHE C., SIEBERT A., WYSE R.F.G., BIENAYME O., NAVARRO J., SIVIERO A., MINCHEV I., PARKER Q., REID W., GILMORE G., MUNARI U. and HELMI A.

Abstract (from CDS):

Stellar population studies of globular clusters have suggested that the brightest clusters in the Galaxy might actually be the remnant nuclei of dwarf spheroidal galaxies. If the present Galactic globular clusters formed within larger stellar systems, they are likely to be surrounded by extratidal halos and/or tails made up of stars that were tidally stripped from their parent systems. The stellar surroundings around globular clusters are therefore one of the best places to look for the remnants of an ancient dwarf galaxy. Here an attempt is made to search for tidal debris around the supernovae enriched globular clusters M 22 and NGC 1851, as well as the kinematically unique cluster NGC 3201. The stellar parameters from the RAdial Velocity Experiment (RAVE) are used to identify stars with the RAVE metallicities, radial velocities, and elemental abundances that are consistent with the abundance patterns and properties of the stars in M 22, NGC 1851, and NGC 3201. Discovery of RAVE stars that may be associated with M 22 and NGC 1851 are reported, some of which are at projected distances ∼10-degrees away from the core of these clusters. Numerous RAVE stars associated with NGC 3201 suggest that either the tidal radius of this cluster is underestimated or that there are some unbound stars extending a few arc minutes from the edge of the cluster's radius. No other extratidal stars associated with NGC 3201 could be identified. The bright magnitudes of the RAVE stars make them easy targets for high-resolution follow-up observations, eventually allowing further chemical tagging to solidify (or exclude) stars outside the tidal radius of the cluster as tidal debris. In both our radial velocity histograms of the regions surrounding NGC 1851 and NGC 3201, a peak of stars at ∼230km/s is seen, consistent with extended tidal debris from ω Centauri.

Abstract Copyright:

Journal keyword(s): globular clusters: individual: M 22 - Galaxy: formation - Galaxy: kinematics and dynamics - Galaxy: structure - Galaxy: stellar content - Galaxy: evolution

Simbad objects: 29

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Number of rows : 29
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1025 0
2 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1709 1
3 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6818 1
4 UCAC4 245-005607 Pe* 04 57 15.2417116200 -41 02 30.062769288   14.895 13.341 12.965   ~ 8 0
5 UCAC2 16744578 * 05 00 24.0155810928 -35 23 15.202713084   13.868 12.216 11.84 10.67 ~ 5 0
6 UCAC2 13491350 * 05 08 10.9558507152 -42 40 46.345100880   13.955 12.229 11.85 10.50 ~ 5 0
7 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1399 0
8 2MASS J05140714-4002568 AB* 05 14 07.1424991636 -40 02 57.125841856           ~ 8 0
9 TYC 7607-638-1 * 05 22 49.5937824552 -44 19 07.723133040   13.076 11.796     ~ 5 0
10 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16968 1
11 DENIS J052813.4-461514 LP? 05 28 13.4339676144 -46 15 14.690462472   14.043 12.558 11.8 11.052 CEMP 11 0
12 UCAC4 212-006718 Pe* 05 44 21.4204997520 -47 42 53.650152972   14.119 13.128 12.888 11.913 ~ 7 0
13 UCAC4 230-007275 * 05 47 37.8972066648 -44 09 10.095376140   13.713 12.823 12.679   ~ 7 0
14 UCAC4 236-007389 Pe* 05 52 10.6973815488 -42 48 17.890823412   14.537 13.388 13.161 12.177 ~ 12 0
15 UCAC2 14545549 SB* 05 53 31.9524226680 -40 27 16.604271828   14.379 13.131 12.86 11.87 ~ 7 0
16 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 916 0
17 UCAC2 11967780 Pe* 10 14 05.6387423928 -46 28 40.585188576   13.936 12.606 12.22 11.09 ~ 8 0
18 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 853 0
19 UCAC2 11740620 Pe* 10 20 25.8615573120 -46 44 05.822303604   13.505 11.675 11.11 9.65 ~ 7 0
20 NGC 5129 LIN 13 24 10.0256041224 +13 58 35.575742748   13.3       ~ 125 1
21 NGC 5466 GlC 14 05 27.29 +28 32 04.0     9.70     ~ 816 0
22 NAME Serpens Dwarf GlC 15 16 05.30 -00 06 41.0   15.1       ~ 715 1
23 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13888 0
24 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 817 1
25 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1348 0
26 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 1045 0
27 UCAC2 21194412 * 19 09 13.1106113808 -26 01 08.086799712   14.155 12.784 12.48 11.28 ~ 5 0
28 NAME Local Group GrG ~ ~           ~ 8144 0
29 NAME Galactic Bulge reg ~ ~           ~ 4158 0

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2023.09.21-17:47:26

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